Synthetic rubberlike resinous composition



. with tr'icresyl phosphate have,

A tion, to its use as tendency of the composition to lose plasticizer at elevated; temperatures.

accelerated test conditions as 55% of tricresyl phosphate at 125 C. over a Patented Aug. 19, 1941 UNITED STATES PATENT ,OEFICE SYNTHETIC RUBBERLIKE RESINOUS COMPOSITION John J. Russell, Schenectady, N. General Electric Company,

New York No Drawing.

Serial No. 201,563.

Y., assignor to a corporation of Original application April 12, 1938,

Divided and thin May 24, 1940, Serial this applica- Claims. (Cl. 260-36) This application is a division of my copending application Serial No. 201,563,,filed April 12, 1938, and assigned to the assignee of the present invention.

This invention relates generally to synthetic rubberlike-resinous compositions and particularly to compositions comprising polyvinyl halide.

As is known, a polyvinyl halide, such as polyvinyl chloride, may be plasticized to yield synthetic rubber-like compositions. The most common plasticizer for this purpose is tricresyl phosphate. Polyvinyl halide compositions plasticized however, a relatively narrow temperature range in which they possess rubber-like properties and this matebelow 0 F. Another, though less serious limitaelectrical insulation, is the Thus under certain it may lose as much period of 100 hours. y Th ideal plasticizer positions is one for polyvinyl halide conifollowing conditions:

1. Ability to withstand mechanical abuse tending to damage it when used as electrical insula tion at temperatures as low as F.

2. A minimum loss position under accelerated test at 125 C. for 100 hours.

3. Extrudibility onwire. By extensive investigation of" the subject I have established the following conclusions: 1

Thus, it is apparent that the problem of findin: in one compound all of the properties for the ideal p is complex. Investigation has, however,ledtothe eryofaoertainclass oteompoundcwhichcloaelyapproaehtheideal of plasticizer from the comanedicarboxylic,

which would impart properties to the plastic composition which will fit it for the 1,929,453 oi. Oct. 10, 1933.

phosphate and an ester of Callas-:04 where -uplasticizer. I have discovered that esters formed by the esterification of a relatively long chain saturated aliphatic dibasic acid containing at least six carbon atoms in the molecule (that is acids of the general class (01113211404) where nis at least 6 and preferably 6 to 12 inelusive) and alcohols of the class C6Hs (CH2) nOH where -nis an integer, closely approach the total of the combination of properties desired in a plasticizer to impart low temperature flexibility, high tensile strength and low loss of plasticizer in the plastic composition.

For example, typicalalcohols of the class mentioned which may adipic, pimclic, suberic, azelaic, sebacic, nondccamethylene-dicarboxylic, etc. The esters may be prepared by esterifying the alcohol and acid in any well known manner.

My invention'includes not only the use of the simple esters but also the use with simple esters tion mixtures ricinoleic acid, acetylated esters of polymerized ricinoleic acid and others including such plasticizers as are mentioned in Semon Patent No.

Obviously, the properties of the plastic compositions will vary with the proportions of the various plasticizers used and in each case the proportions chosen must be suited to the properties desired in the prodnot and the conditions of use.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. A resinous composition comprising a polyvinyl halide plasticized with an ester of a phenyl alkyl alcohol and an aliphatic dibasic class Col-121140;, where 1|- is at least 6.

2. A resinous composition "comprising polyvinyl chloride piasticized with bis(phenyl propyl) sebacate. p

3. A resinous composition comp rising po vinyl chloride plasticized with bis(phenyl ethyl) sebacate.

4. Polyvinyl halide plasticized with tricresyl a phenyl alkyl alcohol aliphatic dibasic acid of the class is at least 6.-

5. A composition comprising polyvinyl chloride and a bis(phenyl alkyl) sebacate.

JOHN J, unseen.

and

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